Writing instrument



FIG. 1 is a front elevational view of a writing instrument showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a side elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is an enlarged cross-sectional view taken along lines 6--6 of FIG. 1;

FIG. 7 is an enlarged cross-sectional view taken along lines 7--7 of FIG. 1; and

FIG. 8 is a perspective view of FIG. 1. 

The ornamental design for a writing instrument, as shown and described. 